Process for coating electrically conductive substrates, an aqueous coating composition, process for the preparation of an adduct containing urethane groups and an adduct containing urethane groups

摘要

PCT No. PCT/EP90/01189 Sec. 371 Date Jan. 24, 1991 Sec. 102(e) Date Jan. 24, 1991 PCT Filed Jul. 20, 1990 PCT Pub. No. WO91/02035 PCT Pub. Date Feb. 21, 1991The invention relates to a cathodic electro-dipping process, which comprises a procedure in which the electro-dipping primer used contains an adduct containing urethane groups which is obtainable by reacting with one another a polyester-polyol or polyether-polyol, a polyisocyanate and a compound which contains a hydroxyl group and at least one ketimine group in the molecule.